object Five1 {
  def main(args: Array[String]):Unit = {
    var sender: String = "Dream"
    var recipient: String = "Livelihood"
    var id: Int = 12345
    var time: String = "2025-10-1 12:03:40"
    var isReceived: Boolean = true

    println(s"寄件人：$sender")
    println(s"收件人：$recipient")
    println(s"编号：$id")
    println(s"到达时间：$time")
    println(s"是否被签收：$isReceived")
  }
}
